Hi Girl-geek and Motox. Nice to see your posts.
No anesthesia except for local gel in your nose. For prep if they are doing pH test you have to go off ppi and other acid reducers for a week or ten days, depending on your doc.
I had manometry and Bravo PH testing prior to fundoplication. The problems you encounter with the testing totally depends on your gag reflex. Mine is way past awful, so my experience was terrible. But don't go by me! Most people tolerate it reasonably well.
In manometry they run a very thin tube down your nose into your stomach. They have you swallow a few sips of water to get the thing down. In my worst case scenario I gagged and threw up uncontrollably the whole time (4 attempts) and the tube curled into my trachea. So they had to put an endoscope down my nose, put a wire down that, took out the endoscope and thread the mano tube onto that and remove the wire. I have never read another post that sounded so bad.
Usually they will do the pH test immediately following manometry. Unless they are doing the old nose tube that stays in your nose 24 hours, that tube goes down your mouth and they pin a large capsule to your esophagus. The capsule radios pH to a recorder on your belt. Mine fell off after 24 hours, but usually they hang on for several days. Most people don't feel anything, but I did and the procedure hurt and the capsule kept hurting until it fell off. I was going to go to the ER and have it removed. They wanted to redo the test because they felt they didn't have enough information, but I kept notes on my food log (I keep it for my allergies) and my doc accepted that and did the op anyway. My pH never got above 2, which is awful. My LES was wide open and I suffered horribly from the prep.
Again, my reactions are not the usual!